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Cheap flights from St. Louis to Sofia from $639

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 5/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:01 am - 12:10 pm
STL
-
SOF
22h 09m
2 stops
United Airlines Logo
6:10 am - 5:06 pm
SOF
-
STL
18h 56m
2 stops
$783United Airlines
ن, أغسطس 10 - ر, أغسطس 26
Lufthansa Logo
1:13 pm - 12:10 pm
STL
-
SOF
14h 57m
2 stops
Lufthansa Logo
7:00 pm - 1:25 pm
SOF
-
STL
26h 25m
1 stop
$785Lufthansa
ن, أغسطس 10 - ن, أغسطس 24
United Airlines Logo
3:30 pm - 1:25 pm
STL
-
SOF
13h 55m
1 stop
United Airlines Logo
6:10 am - 8:38 pm
SOF
-
STL
22h 28m
2 stops
$790United Airlines
ن, أغسطس 10 - ث, أغسطس 25
United Airlines Logo
7:00 am - 1:05 pm
STL
-
SOF
22h 05m
3 stops
United Airlines Logo
6:10 am - 10:00 pm
SOF
-
STL
23h 50m
2 stops
$795United Airlines
ث, أغسطس 11 - ر, أغسطس 26
Lufthansa Logo
12:59 pm - 11:15 pm
STL
-
SOF
26h 16m
2 stops
Lufthansa Logo
7:00 pm - 1:25 pm
SOF
-
STL
26h 25m
1 stop
$796Lufthansa
ث, أغسطس 11 - ن, أغسطس 24
Lufthansa Logo
3:30 pm - 1:25 pm
STL
-
SOF
13h 55m
1 stop
Lufthansa Logo
7:00 pm - 1:25 pm
SOF
-
STL
26h 25m
1 stop
$799Lufthansa
ن, أغسطس 10 - ن, أغسطس 24
Multiple Airlines Logo
12:10 pm - 6:40 pm
STL
-
SOF
22h 30m
2 stops
Multiple Airlines Logo
7:25 pm - 1:25 pm
SOF
-
STL
26h 00m
2 stops
$804Multiple Airlines
ن, أغسطس 10 - ن, أغسطس 24
Lufthansa Logo
12:59 pm - 11:15 pm
STL
-
SOF
26h 16m
2 stops
Lufthansa Logo
7:25 pm - 1:25 pm
SOF
-
STL
26h 00m
2 stops
$810Lufthansa
ث, أغسطس 11 - ن, أغسطس 24
United Airlines Logo
7:05 pm - 11:15 pm
STL
-
SOF
20h 10m
2 stops
United Airlines Logo
6:10 am - 8:38 pm
SOF
-
STL
22h 28m
2 stops
$817United Airlines
ح, أغسطس 9 - ث, أغسطس 25
Multiple Airlines Logo
12:10 pm - 6:40 pm
STL
-
SOF
22h 30m
2 stops
Multiple Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$818Multiple Airlines
ث, سبتمبر 8 - ر, سبتمبر 16

Lufthansa flights from St. Louis to Sofia

Our best Lufthansa deals on St. Louis to Sofia flight tickets
Lufthansa
Aug 10
STL1:13 pmLambert-St Louis
14h 57m
2 stops
SOF12:10 pmSofia
Aug 24
SOF7:00 pmSofia
26h 25m
1 stop
STL1:25 pmLambert-St Louis
$785
Lufthansa
Aug 11
STL12:59 pmLambert-St Louis
26h 16m
2 stops
SOF11:15 pmSofia
Aug 24
SOF7:00 pmSofia
26h 25m
1 stop
STL1:25 pmLambert-St Louis
$796
Lufthansa
Aug 10
STL3:30 pmLambert-St Louis
13h 55m
1 stop
SOF1:25 pmSofia
Aug 24
SOF7:00 pmSofia
26h 25m
1 stop
STL1:25 pmLambert-St Louis
$799

United Airlines flights from St. Louis to Sofia

Our best United Airlines deals on St. Louis to Sofia flight tickets
United Airlines
Aug 10
STL6:01 amLambert-St Louis
22h 09m
2 stops
SOF12:10 pmSofia
Aug 26
SOF6:10 amSofia
18h 56m
2 stops
STL5:06 pmLambert-St Louis
$783
United Airlines
Aug 10
STL3:30 pmLambert-St Louis
13h 55m
1 stop
SOF1:25 pmSofia
Aug 25
SOF6:10 amSofia
22h 28m
2 stops
STL8:38 pmLambert-St Louis
$790
United Airlines
Aug 11
STL7:00 amLambert-St Louis
22h 05m
3 stops
SOF1:05 pmSofia
Aug 26
SOF6:10 amSofia
23h 50m
2 stops
STL10:00 pmLambert-St Louis
$795

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated مايو 17, 2026.
Use the filters below to find and compare flights from St. Louis to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ن 8/10

6:01 am-12:10 pm

2 stops22h 09m

Sofia

ر 8/26

6:10 am-5:06 pm

2 stops18h 56m

$783

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ن 8/10

1:13 pm-12:10 pm

2 stops14h 57m

Sofia

ن 8/24

7:00 pm-1:25 pm

1 stop26h 25m

$785
Quickest round-trip

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ن 8/10

3:30 pm-1:25 pm

1 stop13h 55m

Sofia

ث 8/25

6:10 am-8:38 pm

2 stops22h 28m

$790

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ث 8/11

7:00 am-1:05 pm

3 stops22h 05m

Sofia

ر 8/26

6:10 am-10:00 pm

2 stops23h 50m

$795

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ث 8/11

12:59 pm-11:15 pm

2 stops26h 16m

Sofia

ن 8/24

7:00 pm-1:25 pm

1 stop26h 25m

$796

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ن 8/10

3:30 pm-1:25 pm

1 stop13h 55m

Sofia

ن 8/24

7:00 pm-1:25 pm

1 stop26h 25m

$799

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ن 8/10

12:10 pm-6:40 pm

2 stops22h 30m

Sofia

ن 8/24

7:25 pm-1:25 pm

2 stops26h 00m

$804

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ث 8/11

12:59 pm-11:15 pm

2 stops26h 16m

Sofia

ن 8/24

7:25 pm-1:25 pm

2 stops26h 00m

$810

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ح 8/9

7:05 pm-11:15 pm

2 stops20h 10m

Sofia

ث 8/25

6:10 am-8:38 pm

2 stops22h 28m

$817

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

ث 9/8

12:10 pm-6:40 pm

2 stops22h 30m

Sofia

ر 9/16

6:20 am-1:25 pm

1 stop15h 05m

$818

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Sofia from

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between St. Louis and Sofia?

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from St. Louis is in October. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from St. Louis during January instead. Flights to Sofia in January, while not as cheap as those in October, still average around $528.

Can stopping save me money on St. Louis to Sofia flights?

You could potentially save up to 19% on your flight if you consider stops on a St. Louis to Sofia flight.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Fastest flight time

14h 11m

Direct flights

None
The fastest flight from St. Louis to Sofia takes 14h 11m
There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.
Search flight deals

Frequently asked questions about flying from St. Louis to Sofia

  • How far is Lambert-St Louis to Sofia by plane?

    A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 14h 11m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

    Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Sofia?

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $559Free CancellationRating
7.4
9,730 reviews
Search United Airlines flights
LufthansaPriceFrom $567Free CancellationRating
6.8
8,004 reviews
Search Lufthansa flights
Air CanadaPriceFrom $1,108Free CancellationRating
7.1
11,054 reviews
Search Air Canada flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

Price alerts on flights to Sofia from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Lufthansa
United Airlines
Air Canada